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22 Cards in this Set
- Front
- Back
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How do we describe the displacement of the colon? |
By where the pelvic flexure is. |
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Are all colon displacements surgical cases? |
No - the L colon displacement may be medically management. |
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What type of vascular compromise occurs with displacement? |
Not much -- it is a luminal obstruction with little or no vascular compromise. |
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What two parts of the physical exam and work up will be most helpful in diagnosis of a colon displacement? |
Rectal palpation and abdominal ultrasound. |
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What does the abdominocentesis look like with a colon displacement? |
Pretty much normal. |
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Which side of the colon moves in a displacement? |
LEFT -- tends to move up the body wall between the cecum and the body wall. |
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Where does the colon get trapped in a L dorsal displacement? |
between the speen and L kidney, on the nephrosplenic ligament
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How do you treat a nephrosplenic entrapment |
Roll them (need a full 360º), done under anes - start in R lateral recumbency, legs OVER to L lateral (shaking them around a bit) and then legs under to end in R lateral. |
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What is the deal with phenylephrine treatment for nephrosplenic entrapment? |
It is supposed the "shrink" the spleen and then you JOG the horse to get the colon back in place (does not work with Schlipf) |
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What should we worry about complication wise with treatment of phenylephrine? |
hemorrhage associated with rupture of vessels |
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Which is the most painful and severe form of colic? |
COLON TORSION/VOLVULUS |
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Which sub category of horses is most at risk for colon torsion/volvulus |
Post parturient mares that are 30 d post foaling. |
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How fast does surgery need to happen in a colon torsion/volvulus? |
within 1-2 hours -- there is a lot of vascular compromise and if beyond the 2 hour mark, there is so much ischemic damage that the colon is toast. |
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How many degrees of rotation will cause a strangulation in volvulus |
> 360º |
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Can you control the pain in a colon torsion or volvulus? |
NO -- it is refractory to banamine and xylazine. |
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How much of the colon can be resected in a horse and still have the GIT function? |
70-80% |
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What will happen clinically if you R/A that much of the colon? |
The cecum will take over the job, and for a while there will be wt loss and diarrhea (changes in manure) while they are readjusting. |
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IS there anyway to PREVENT a colon torsion? |
Brood mare that does not need to exercise much -- colopexy (if she has tossed 2+ times) |
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What is the prognosis for a colon torsion? |
Poor to grave (think of all the ischemia and tissue damage from reperfusion) |
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Is grain overload painful? |
YES!!! There is a lot of distention going on. |
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Do we need to worry about shock with a grain overload? |
YES -- they are heading that way *really high HR, toxic. |
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What is a huge concern with grain overload that is not GIT related? |
Laminitis *either already there or starting* |
